Optimized aerodynamic profile for a turbine blade, in particular for a rotary wheel of a turbine

ABSTRACT

When cold and in the non-coated state, the aerodynamic profile is substantially identical to a nominal profile determined by the Cartesian coordinates X,Y, Zadim given in Table 1, in which the coordinate Zadim is the quotient D/H where D is the distance of the point under consideration from a first reference plane P 0  situated at the base of the nominal profile, and H is the height of said profile measured from the first reference plane to a second reference plane P 1 . The measurements D and H are taken radially relative to the axis of the turbine, while the X coordinate is measured in the axial direction of the turbine.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of priority to U.S. PatentApplication No. 62/504,565, filed on May 11, 2017, the entirety of whichis incorporated by reference herein.

INTRODUCTION

The present disclosure relates to an aerodynamic profile for a turbineblade.

In particular, the disclosure relates to the aerodynamic profile of ablade of a rotary wheel of a gas turbine, and more particularly of a lowpressure turbine of the type used in a turbojet of an aircraft.

The disclosure relates in particular to a blade of the rotary wheel of aturbine having a plurality of stages, preferably five stages.

Such a profile should enable the turbine to provide the desiredefficiency, and in order to do that it must be such that the flow of airaround the profile is sound, i.e. substantially such that it does notgive rise to turbulence, which is harmful for overall efficiency.

It must be capable of being installed properly in the environment of theengine, and in particular, for the blade of a rotary wheel forming aportion of the rotor of the turbine, it must be capable of beingfastened easily to the support disk of the rotary wheel, via the root ofthe blade, whereas its tip must be capable of carrying a top platform.Furthermore, this part must present a profile enabling it to bemanufactured in a reliable and cost-effective manner by availablemanufacturing methods, such as casting, forging, machining, additivefabrication, or else weaving, without this list being limitative.

Furthermore, the profile of the blade must enable it to withstand themechanical stresses to which the blade is subjected, by enabling thosestresses to be spread over the entire blade in such a manner as to avoidpremature wear thereof. This spreading must apply both in static modeand in dynamic mode. In particular, it must be such that the blade,given its resonant modes, can withstand the highest dynamic loading forgood operation of the turbine.

An object of the disclosure is to propose an aerodynamic profile for aturbine blade that is optimized, and capable of satisfying thoseobjectives.

This object is achieved by the fact that when cold and in a non-coatedstate, said profile is substantially identical to a nominal profiledetermined by the Cartesian coordinates X,Y,Zadim given in Table 1, inwhich the coordinate Zadim is the quotient D/H where D is the distanceof the point P under consideration from a reference X,Y plane situatedat the base of the nominal profile, and H is the height of said profilemeasured from said reference plane that is the intersection of thestacking axis of the blade and the axisymmetric surface of the hub, outto a second reference plane that is the intersection of said stackingaxis with the axisymmetric surface of the casing, the measurements D andH being taken radially relative to the axis of the turbine, while thecoordinate X is measured in the axial direction of the turbine.

This profile has been determined as a result of numerous tests andsimulations. It is defined cold, i.e. at an ambient temperature of 20°C. That is a reference temperature at which the profile is geometricallydetermined. The above-mentioned objectives of aerodynamics andmechanical optimization are naturally valid for the conditions of use ofthis aerodynamic profile, i.e. when hot, at a temperature that isstabilized when the engine of which the turbine forms a part is beingused under cruising conditions.

Furthermore, the aerodynamic profile of the disclosure is defined in thenon-coated state. Since turbine blades are subjected to high temperaturegradients, it is common practice for them to be provided with a coatinghaving thermal properties enabling them more easily to withstand suchtemperature variations. The profile is determined prior to installingsuch a coating.

It is stated above that the profile of the disclosure is “substantiallyidentical” to the nominal profile. This means that the profile maydepart very slightly from said nominal profile.

The aerodynamic profile is thus preferably defined within an envelope of±1 millimeter (mm) in a direction normal to the surface of the nominalprofile.

It is also preferable for the X,Y coordinates of the aerodynamic profileto lie within a range of ±5% relative to the X,Y coordinates of thenominal profile.

In addition, the aerodynamic profile may be positioned rotated within±10°, particularly within ±5°, more particularly within ±3°, withrespect to the stacking axis.

These variations take account in particular of at least one ofmanufacturing tolerances of the profile, the setting of the profile toadapt to the flow coming from the turbine vanes situated upstream, andpossible deformation occurring when mounting the blade and integratingthe same in the rotary wheel. In particular, the profile is adapted soas to be optimized for the flow coming from the nozzle of the same stageof a turbine, when the blade of the disclosure belongs to a rotary wheelof a turbine.

For a blade of a rotary wheel, forming a portion of the rotor of aturbine, the profile serves to optimize the inter-blade flow, i.e. theflow between adjacent blades of the wheel, and thus transforms a maximumamount of the kinetic energy of the gaseous fluid into kinetic energy onthe shaft of the turbine. In addition, it serves to orient the gaseousfluid correctly for the turbine vanes situated downstream, in particularbelonging to the stationary nozzle of the next stage of the turbine, ifsuch a next stage exists.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be better understood and its advantages appear betteron reading the following detailed description of an embodiment given byway of non-limiting example. The description refers to the accompanyingdrawings, in which:

FIG. 1 is a fragmentary axial diagrammatic section view of a turbineincluding a blade of profile that corresponds to that of the disclosure;

FIG. 2 shows a blade of the turbine.

DETAILED DESCRIPTION

The turbine shown in axial section in FIG. 1 comprises five stagesreferenced respectively S1 to S5. In the direction DF going fromupstream to downstream, each stage comprises a nozzle that forms aportion of the stator of the turbine and that has a plurality ofradially-oriented vanes, and a rotary wheel that forms a portion of therotor of the turbine and that likewise includes a plurality ofradially-oriented blades.

In FIG. 1, the vanes of the nozzles of stages S1 to S5 are givenreferences N1 to N5 (these vanes are shown in dashed lines, for ease ofrepresentation), whereas the blades of rotary wheels of stages S1 to S5are given respective references W1 to W5.

In known manner, the vanes of the nozzles are fastened at both ends tostationary structure portions, while the blades of the rotary wheels arefastened to a rotary disk via their roots that are formed at theirradially-inner ends closer to the axis of the rotation A of the turbine.The disks forming parts of the wheels W1 to W5 are constrained to rotatetogether. The tips of the blades of the rotary wheels, formed at theirradially-outer ends, may carry top platforms.

The disclosure relates in particular to a blade of one of the rotarywheels of the turbine that, as mentioned above, preferably comprisesfive stages as shown, without this number being limiting.

The blade shown in FIG. 2 includes, at its radially-inner end, a bladeroot enabling it to be connected to a support disk forming the hub of aturbine wheel, and a platform 14 from which an aerodynamic profile 18extends. At its tip, formed at its radially-outer end remote from theplatform 14, the blade includes a top platform 10 that forms an outercasing carried by the various blades of the wheel.

By convention, the aerodynamic profile 18 is the entire portion of saidblade that extends radially from the platform 14 to the top platform 10.

In FIG. 2, there can be seen a frame of reference comprising Cartesiancoordinates X,Y,Z. The radial direction Z is the height direction of theblade, which extends radially from its root to its tip. This direction Zis perpendicular to the axial direction X which is the direction of theaxis of rotation A of the turbine. The direction Y is perpendicular tothe X,Z plane and is therefore tangential to the direction of rotationof the turbine.

The nominal profile from which the aerodynamic profile of the disclosureis determined is defined in following Table 1 of coordinates, in whichthe coordinates Zadim, measured along the axis Z is non-dimensional,whereas the dimensions X and Y, respectively measured along the axes Xand Y, are expressed in millimeters.

TABLE 1 X Y Zadim −16.2143 −0.22329 −0.15 −16.2635 −0.14878 −0.15−16.3087 −0.02719 −0.15 −16.3169 0.172906 −0.15 −16.2455 0.442612 −0.15−16.0842 0.76941 −0.15 −15.8379 1.151844 −0.15 −15.5059 1.589205 −0.15−15.0838 2.077666 −0.15 −14.5699 2.614373 −0.15 −13.9588 3.191261 −0.15−13.2441 3.796174 −0.15 −12.4187 4.12068 −0.15 −11.4755 5.016296 −0.15−10.4093 5.579833 −0.15 −9.21853 6.067575 −0.15 −7.90897 6.440599 −0.15−6.49598 6.660225 −0.15 −5.0053 6.696405 −0.15 −3.46939 6.533332 −0.15−1.92207 6.168108 −0.15 −0.39525 5.607207 −0.15 1.082798 4.863719 −0.152.489235 3.957023 −0.15 3.806737 2.909771 −0.15 5.030853 1.754203 −0.156.167784 0.524865 −0.15 7.227239 −0.74837 −0.15 8.217446 −2.04215 −0.159.148781 −3.33484 −0.15 10.02709 −4.61051 −0.15 10.85436 −5.8572 −0.1511.6305 −7.0653 −0.15 12.35897 −8.22387 −0.15 13.0412 −9.3242 −0.1513.67568 −10.3603 −0.15 14.2633 −11.3257 −0.15 14.80411 −12.2154 −0.1515.29656 −13.0264 −0.15 15.73918 −13.7569 −0.15 16.13205 −14.4056 −0.1516.47528 −14.972 −0.15 16.76968 −15.4571 −0.15 17.01653 −15.863 −0.1517.21765 −16.1928 −0.15 17.37556 −16.4513 −0.15 17.45892 −16.6617 −0.1517.42717 −16.8164 −0.15 17.37047 −16.8984 −0.15 17.31131 −16.9469 −0.1517.25567 −16.9755 −0.15 17.17663 −16.995 −0.15 17.04781 −16.9862 −0.1516.89517 −16.8817 −0.15 16.74558 −16.6844 −0.15 16.55686 −16.4313 −0.1516.32451 −16.1203 −0.15 16.04632 −15.7492 −0.15 15.72084 −15.3168 −0.1515.34704 −14.8225 −0.15 14.92445 −14.2668 −0.15 14.45346 −13.6508 −0.1513.93418 −12.9768 −0.15 13.36396 −12.2502 −0.15 12.73554 −11.4815 −0.1512.04055 −10.6837 −0.15 11.27371 −9.86958 −0.15 10.43379 −9.05006 −0.159.523481 −8.23368 −0.15 8.547643 −7.42757 −0.15 7.510605 −6.64022 −0.156.416177 −5.88194 −0.15 5.265651 −5.16875 −0.15 4.063109 −4.51549 −0.152.818752 −3.92894 −0.15 1.544859 −3.41025 −0.15 0.255372 −2.95479 −0.15−1.03676 −2.55644 −0.15 −2.31947 −2.20754 −0.15 −3.58181 −1.89989 −0.15−4.814 −1.62598 −0.15 −6.00758 −1.38038 −0.15 −7.15541 −1.16086 −0.15−8.25143 −0.96839 −0.15 −9.29039 −0.80586 −0.15 −10.2674 −0.67612 −0.15−11.1778 −0.58031 −0.15 −12.0171 −0.51728 −0.15 −12.7815 −0.4833 −0.15−13.4682 −0.4722 −0.15 −14.0755 −0.47631 −0.15 −14.6029 −0.48791 −0.15−15.0515 −0.50051 −0.15 −15.4232 −0.50905 −0.15 −15.7197 −0.48096 −0.15−15.9402 −0.4232 −0.15 −16.0845 −0.34594 −0.15 −15.9992 −0.01044 −0.075−16.05 0.062647 −0.075 −16.0999 0.182036 −0.075 −16.1185 0.380886 −0.075−16.0614 0.653208 −0.075 −15.9129 0.984919 −0.075 −15.6749 1.371109−0.075 −15.3465 1.809332 −0.075 −14.925 2.295969 −0.075 −14.4079 2.82682−0.075 −13.7906 3.393645 −0.075 −13.0673 3.984181 −0.075 −12.23174.581472 −0.075 −11.278 5.163161 −0.075 −10.2023 5.700964 −0.075−9.00429 6.161004 −0.075 −7.69089 6.505945 −0.075 −6.27793 6.698896−0.075 −4.79092 6.710433 −0.075 −3.2619 6.524003 −0.075 −1.7246 6.135977−0.075 −0.21047 5.553893 −0.075 1.254244 4.794195 −0.075 2.6488693.877697 −0.075 3.95894 2.828473 −0.075 5.180624 1.676999 −0.0756.318862 0.455093 −0.075 7.381507 −0.80961 −0.075 8.374752 −2.09545−0.075 9.307113 −3.38206 −0.075 10.18426 −4.65341 −0.075 11.00854−5.8972 −0.075 11.7805 −7.10334 −0.075 12.50351 −8.26094 −0.075 13.17911−9.36123 −0.075 13.80636 −10.3979 −0.075 14.38628 −11.3643 −0.075 14.919−12.2555 −0.075 15.40343 −13.0684 −0.075 15.83869 −13.8006 −0.07516.22493 −14.4508 −0.075 16.56233 −15.0187 −0.075 16.85166 −15.5051−0.075 17.0942 −15.912 −0.075 17.29179 −16.2427 −0.075 17.44691 −16.502−0.075 17.52782 −16.7126 −0.075 17.49478 −16.8666 −0.075 17.43762−16.9479 −0.075 17.3783 −16.996 −0.075 17.32136 −17.0246 −0.075 17.24055−17.0435 −0.075 17.10954 −17.0317 −0.075 16.95662 −16.9215 −0.07516.80659 −16.7187 −0.075 16.61663 −16.4589 −0.075 16.38286 −16.1398−0.075 16.1032 −15.7588 −0.075 15.77621 −15.3146 −0.075 15.401 −14.8066−0.075 14.97717 −14.2352 −0.075 14.50452 −13.602 −0.075 13.98459 −12.908−0.075 13.41493 −12.1588 −0.075 12.78962 −11.3633 −0.075 12.10287−10.5321 −0.075 11.35171 −9.67483 −0.075 10.5361 −8.80024 −0.0759.657596 −7.91654 −0.075 8.719497 −7.03124 −0.075 7.724456 −6.15342−0.075 6.675871 −5.2923 −0.075 5.578331 −4.45662 −0.075 4.434621−3.65869 −0.075 3.24748 −2.9129 −0.075 2.01996 −2.23622 −0.075 0.759057−1.64268 −0.075 −0.52414 −1.14061 −0.075 −1.8147 −0.72882 −0.075−3.09687 −0.39838 −0.075 −4.35721 −0.14107 −0.075 −5.5839 0.05226 −0.075−6.76675 0.190572 −0.075 −7.89712 0.281537 −0.075 −8.9677 0.329435−0.075 −9.97205 0.337923 −0.075 −10.9044 0.306651 −0.075 −11.75940.238729 −0.075 −12.5332 0.141896 −0.075 −13.2237 0.027775 −0.075−13.8316 −0.0882 −0.075 −14.3601 −0.18675 −0.075 −14.8121 −0.25658−0.075 −15.1898 −0.28602 −0.075 −15.4928 −0.26907 −0.075 −15.718−0.21196 −0.075 −15.8654 −0.13379 −0.075 −15.7613 −0.77621 0 −15.8182−0.70796 0 −15.8799 −0.59456 0 −15.9216 −0.39969 0 −15.8968 −0.12317 0−15.7828 0.221063 0 −15.5779 0.624698 0 −15.2811 1.083452 0 −14.89091.593755 0 −14.4041 2.150306 0 −13.8162 2.74499 0 −13.1214 3.365783 0−12.3134 3.996191 0 −11.386 4.614523 0 −10.3349 5.193476 0 −9.159075.700396 0 −7.8641 6.099077 0 −6.46408 6.353299 0 −4.98243 6.432719 0−3.44977 6.318032 0 −1.89947 6.002869 0 −0.36308 5.493642 0 1.133994.8086 0 2.572046 3.969162 0 3.93841 3.000773 0 5.22721 1.930749 06.440293 0.788479 0 7.582283 −0.40001 0 8.656648 −1.61411 0 9.668161−2.8349 0 10.62135 −4.04594 0 11.51823 −5.23432 0 12.35935 −6.38939 013.1473 −7.5001 0 13.88319 −8.55754 0 14.56629 −9.555 0 15.19732−10.4859 0 15.77626 −11.345 0 16.30218 −12.1291 0 16.77465 −12.8357 017.19385 −13.4632 0 17.55997 −14.0112 0 17.87387 −14.4806 0 18.1369−14.8733 0 18.35111 −15.1925 0 18.51923 −15.4427 0 18.61064 −15.6485 018.58591 −15.8037 0 18.5334 −15.8878 0 18.47692 −15.9389 0 18.42001−15.9714 0 18.33794 −15.9946 0 18.20298 −15.9867 0 18.0426 −15.8781 017.87838 −15.6774 0 17.66943 −15.4211 0 17.41248 −15.106 0 17.10532−14.7297 0 16.74652 −14.2907 0 16.33525 −13.7885 0 15.87112 −13.2235 015.35414 −12.5971 0 14.78491 −11.9114 0 14.16341 −11.1701 0 13.48675−10.3803 0 12.75187 −9.5508 0 11.9578 −8.68954 0 11.10616 −7.80326 010.19878 −6.89942 0 9.237644 −5.98628 0 8.224145 −5.07372 0 7.160738−4.17147 0 6.049724 −3.29062 0 4.893685 −2.44326 0 3.695374 −1.64301 02.458023 −0.90517 0 1.186194 −0.24625 0 −0.1138 0.315651 0 −1.432470.762529 0 −2.75482 1.084075 0 −4.06266 1.277793 0 −5.33687 1.352163 0−6.56056 1.32375 0 −7.72067 1.211219 0 −8.80743 1.031888 0 −9.813790.801845 0 −10.7349 0.535826 0 −11.5693 0.251126 0 −12.3178 −0.03556 0−12.9835 −0.30809 0 −13.5711 −0.55158 0 −14.0851 −0.75444 0 −14.5312−0.90256 0 −14.9112 −0.98725 0 −15.2228 −1.0031 0 −15.458 −0.96204 0−15.6146 −0.8923 0 −15.4267 −0.5902 0.100003 −15.4865 −0.52459 0.100003−15.5555 −0.41555 0.100003 −15.614 −0.22521 0.100003 −15.6133 0.0522310.100003 −15.5218 0.402836 0.100003 −15.333 0.813893 0.100003 −15.0461.278331 0.100003 −14.6603 1.791445 0.100003 −14.1733 2.347062 0.100003−13.5813 2.936882 0.100003 −12.8796 3.548819 0.100003 −12.0628 4.1665620.100003 −11.126 4.768943 0.100003 −10.066 5.329722 0.100003 −8.883325.817889 0.100003 −7.5842 6.199296 0.100003 −6.18278 6.439655 0.100003−4.70175 6.509591 0.100003 −3.17068 6.388979 0.100003 −1.62226 6.0703760.100003 −0.08801 5.558486 0.100003 1.407689 4.87335 0.100003 2.8464494.037543 0.100003 4.217353 3.07773 0.100003 5.514809 2.020161 0.1000036.739415 0.892057 0.100003 7.894063 −0.28244 0.100003 8.980421 −1.484210.100003 10.00204 −2.69505 0.100003 10.9633 −3.89825 0.100003 11.86675−5.08027 0.100003 12.71359 −6.22984 0.100003 13.50596 −7.33618 0.10000314.24496 −8.3903 0.100003 14.93037 −9.38509 0.100003 15.56286 −10.3140.100003 16.14241 −11.1718 0.100003 16.66839 −11.955 0.100003 17.14083−12.6609 0.100003 17.55989 −13.2878 0.100003 17.92581 −13.8353 0.10000318.23945 −14.3044 0.100003 18.50219 −14.6969 0.100003 18.71612 −15.0160.100003 18.884 −15.2661 0.100003 18.97519 −15.4717 0.100003 18.95063−15.6269 0.100003 18.89829 −15.711 0.100003 18.84199 −15.7622 0.10000318.78304 −15.7958 0.100003 18.6979 −15.8192 0.100003 18.55843 −15.80720.100003 18.39586 −15.6899 0.100003 18.22637 −15.4817 0.100003 18.01026−15.2161 0.100003 17.74471 −14.8895 0.100003 17.42752 −14.4992 0.10000317.05733 −14.0438 0.100003 16.63342 −13.5223 0.100003 16.15543 −12.93530.100003 15.62358 −12.2841 0.100003 15.03846 −11.5707 0.100003 14.40082−10.7983 0.100003 13.71064 −9.97196 0.100003 12.96895 −9.09658 0.10000312.17588 −8.17901 0.100003 11.33202 −7.22653 0.100003 10.43915 −6.246280.100003 9.49692 −5.24826 0.100003 8.505643 −4.2428 0.100003 7.466213−3.24071 0.100003 6.378159 −2.25541 0.100003 5.241516 −1.30144 0.1000034.056854 −0.39475 0.100003 2.826065 0.447682 0.100003 1.551466 1.205640.100003 0.238305 1.857891 0.100003 −1.10355 2.384451 0.100003 −2.46042.763912 0.100003 −3.81209 2.979494 0.100003 −5.13261 3.028301 0.100003−6.39543 2.922544 0.100003 −7.57837 2.684316 0.100003 −8.66667 2.3437880.100003 −9.65433 1.935442 0.100003 −10.5417 1.490526 0.100003 −11.33381.03714 0.100003 −12.0393 0.600315 0.100003 −12.6669 0.199426 0.100003−13.2256 −0.14917 0.100003 −13.7215 −0.43453 0.100003 −14.1599 −0.645610.100003 −14.5425 −0.77272 0.100003 −14.8632 −0.81025 0.100003 −15.108−0.77506 0.100003 −15.2715 −0.70604 0.100003 −15.0017 −0.22014 0.199999−15.0639 −0.1566 0.199999 −15.1386 −0.05124 0.199999 −15.2109 0.1346380.199999 −15.2302 0.411807 0.199999 −15.1569 0.767196 0.199999 −14.98011.184258 0.199999 −14.6988 1.653135 0.199999 −14.3136 2.167775 0.199999−13.8229 2.72158 0.199999 −13.2238 3.305795 0.199999 −12.5121 3.908240.199999 −11.6837 4.512736 0.199999 −10.7346 5.098641 0.199999 −9.662965.640737 0.199999 −8.47047 6.109563 0.199999 −7.16417 6.472954 0.199999−5.75822 6.698536 0.199999 −4.2746 6.758128 0.199999 −2.74178 6.6316720.199999 −1.19152 6.310731 0.199999 0.344593 5.797053 0.199999 1.8417175.109325 0.199999 3.281429 4.270382 0.199999 4.653465 3.307979 0.1999995.952017 2.247934 0.199999 7.177508 1.117247 0.199999 8.332829 −0.059920.199999 9.420156 −1.26396 0.199999 10.44261 −2.47709 0.199999 11.40455−3.68259 0.199999 12.30902 −4.86653 0.199999 13.15758 −6.01739 0.19999913.95168 −7.1249 0.199999 14.69224 −8.18019 0.199999 15.37929 −9.175980.199999 16.01326 −10.1058 0.199999 16.59402 −10.9646 0.199999 17.121−11.7488 0.199999 17.59427 −12.4556 0.199999 18.01359 −13.0836 0.19999918.37968 −13.6322 0.199999 18.6934 −14.1022 0.199999 18.95616 −14.49550.199999 19.17007 −14.8153 0.199999 19.3379 −15.0659 0.199999 19.4292−15.2719 0.199999 19.40492 −15.4273 0.199999 19.3527 −15.5116 0.19999919.29644 −15.5631 0.199999 19.23693 −15.5971 0.199999 19.1509 −15.62070.199999 19.01009 −15.6076 0.199999 18.84682 −15.4877 0.199999 18.67598−15.2771 0.199999 18.45824 −15.0083 0.199999 18.19083 −14.6776 0.19999917.87165 −14.2824 0.199999 17.49944 −13.8208 0.199999 17.07343 −13.29210.199999 16.59318 −12.697 0.199999 16.05934 −12.0362 0.199999 15.47245−11.312 0.199999 14.83354 −10.5274 0.199999 14.14398 −9.6862 0.19999913.40554 −8.79274 0.199999 12.61698 −7.85495 0.199999 11.7781 −6.880790.199999 10.88962 −5.87829 0.199999 9.952469 −4.85629 0.199999 8.967408−3.82461 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−0.43576 8.06147 0.699999 1.073899 7.519963 0.699999 2.556296.816315 0.699999 3.991934 5.96498 0.699999 5.367582 4.986558 0.6999996.675808 3.904325 0.699999 7.914406 2.742514 0.699999 9.084813 1.5244610.699999 10.19038 0.271516 0.699999 11.23434 −0.99792 0.699999 12.21933−2.26803 0.699999 13.14904 −3.52375 0.699999 14.02633 −4.752 0.69999914.85286 −5.94163 0.699999 15.62845 −7.08381 0.699999 16.35349 −8.170160.699999 17.02815 −9.19339 0.699999 17.65178 −10.1478 0.699999 18.22363−11.0288 0.699999 18.7431 −11.8328 0.699999 19.20986 −12.5571 0.69999919.62378 −13.2005 0.699999 19.98514 −13.7625 0.699999 20.29475 −14.2440.699999 20.55398 −14.647 0.699999 20.76493 −14.9748 0.699999 20.93039−15.2317 0.699999 21.02077 −15.4413 0.699999 20.99435 −15.5984 0.69999920.94059 −15.6834 0.699999 20.88302 −15.7348 0.699999 20.82142 −15.76880.699999 20.7327 −15.7914 0.699999 20.58856 −15.7744 0.699999 20.42527−15.6458 0.699999 20.25611 −15.4247 0.699999 20.0407 −15.1426 0.69999919.77647 −14.7952 0.699999 19.46151 −14.3796 0.699999 19.09479 −13.8940.699999 18.67594 −13.3371 0.699999 18.20491 −12.7093 0.699999 17.6824−12.0114 0.699999 17.10917 −11.2456 0.699999 16.48632 −10.4147 0.69999915.81503 −9.52272 0.699999 15.09652 −8.57463 0.699999 14.33064 −7.577280.699999 13.51945 −6.53673 0.699999 12.66288 −5.46142 0.699999 11.75938−4.36193 0.699999 10.81089 −3.24681 0.699999 9.816157 −2.12812 0.6999998.772462 −1.02041 0.699999 7.680846 0.063844 0.699999 6.541356 1.1098030.699999 5.35274 2.099054 0.699999 4.116651 3.01348 0.699999 2.8376113.835158 0.699999 1.523118 4.546383 0.699999 0.183875 5.129804 0.699999−1.16467 5.571999 0.699999 −2.50284 5.866025 0.699999 −3.80872 6.011010.699999 −5.05985 6.013699 0.699999 −6.23557 5.88881 0.699999 −7.319585.658926 0.699999 −8.30128 5.349865 0.699999 −9.17628 4.989452 0.699999−9.94606 4.605225 0.699999 −10.6171 4.223228 0.699999 −11.2001 3.867770.699999 −11.7069 3.559688 0.699999 −12.1505 3.319349 0.699999 −12.53983.167093 0.699999 −12.8716 3.121907 0.699999 −13.1236 3.169105 0.699999−13.2882 3.251231 0.699999 −13.4695 4.274101 0.800001 −13.5318 4.3399080.800001 −13.6113 4.44497 0.800001 −13.7008 4.627581 0.800001 −13.74734.907084 0.800001 −13.6892 5.27253 0.800001 −13.4996 5.6938 0.800001−13.1773 6.148734 0.800001 −12.7245 6.622767 0.800001 −12.1427 7.1033160.800001 −11.4326 7.576537 0.800001 −10.5948 8.026177 0.800001 −9.631488.433389 0.800001 −8.54728 8.777253 0.800001 −7.35018 9.035512 0.800001−6.05222 9.18609 0.800001 −4.6697 9.208414 0.800001 −3.22288 9.0850410.800001 −1.73517 8.803192 0.800001 −0.2312 8.358162 0.800001 1.265257.752378 0.800001 2.731516 6.99192 0.800001 4.151176 6.093432 0.8000015.512888 5.076981 0.800001 6.810172 3.964381 0.800001 8.041204 2.7783580.800001 9.207341 1.54086 0.800001 10.3116 0.272126 0.800001 11.35685−1.01027 0.800001 12.345 −2.29133 0.800001 13.27931 −3.55647 0.80000114.16226 −4.7929 0.800001 14.9951 −5.98979 0.800001 15.77735 −7.138450.800001 16.50928 −8.23056 0.800001 17.19085 −9.25891 0.800001 17.82119−10.2179 0.800001 18.39944 −11.103 0.800001 18.92496 −11.9106 0.80000119.39728 −12.6381 0.800001 19.81622 −13.2842 0.800001 20.18201 −13.84860.800001 20.49545 −14.3322 0.800001 20.75789 −14.7369 0.800001 20.97145−15.066 0.800001 21.13897 −15.324 0.800001 21.23149 −15.5343 0.80000121.2058 −15.6926 0.800001 21.15214 −15.7784 0.800001 21.0944 −15.83040.800001 21.0323 −15.8648 0.800001 20.94279 −15.8878 0.800001 20.79729−15.8706 0.800001 20.633 −15.74 0.800001 20.46217 −15.517 0.80000120.24456 −15.2322 0.800001 19.97758 −14.8818 0.800001 19.65927 −14.46260.800001 19.28856 −13.9727 0.800001 18.86504 −13.4111 0.800001 18.38866−12.7781 0.800001 17.86013 −12.0744 0.800001 17.28028 −11.3022 0.80000116.65021 −10.4644 0.800001 15.97129 −9.56499 0.800001 15.24482 −8.608820.800001 14.47094 −7.60262 0.800001 13.65187 −6.55238 0.800001 12.78781−5.46642 0.800001 11.87767 −4.35498 0.800001 10.92369 −3.22637 0.8000019.92484 −2.0924 0.800001 8.878992 −0.967 0.800001 7.787649 0.1380690.800001 6.65083 1.208384 0.800001 5.467365 2.226364 0.800001 4.2392083.175381 0.800001 2.970275 4.038412 0.800001 1.66684 4.798177 0.8000010.338111 5.437691 0.800001 −1.00241 5.943055 0.800001 −2.33732 6.3047440.800001 −3.64576 6.521843 0.800001 −4.90652 6.59651 0.800001 −6.098666.539227 0.800001 −7.20423 6.369 0.800001 −8.21034 6.10997 0.800001−9.11021 5.789378 0.800001 −9.90321 5.435227 0.800001 −10.5944 5.074870.800001 −11.1934 4.73395 0.800001 −11.7125 4.435463 0.800001 −12.16424.200215 0.800001 −12.5588 4.051031 0.800001 −12.8941 4.00827 0.800001−13.1478 4.059512 0.800001 −13.3123 4.145695 0.800001 −13.2981 6.0050390.900004 −13.3549 6.076836 0.900004 −13.425 6.189912 0.900004 −13.49736.382116 0.900004 −13.5173 6.667519 0.900004 −13.4256 7.02973 0.900004−13.1971 7.436414 0.900004 −12.8318 7.864858 0.900004 −12.3325 8.2994290.900004 −11.7013 8.726219 0.900004 −10.94 9.129984 0.900004 −10.05129.493218 0.900004 −9.03957 9.796251 0.900004 −7.91265 10.01811 0.900004−6.6818 10.13751 0.900004 −5.36235 10.13465 0.900004 −3.97336 9.9925130.900004 −2.53683 9.698647 0.900004 −1.0763 9.246243 0.900004 0.3846478.634692 0.900004 1.823992 7.869247 0.900004 3.223793 6.962353 0.9000044.570754 5.930882 0.900004 5.856571 4.794697 0.900004 7.076724 3.5742430.900004 8.230809 2.290625 0.900004 9.321118 0.964213 0.900004 10.35126−0.38617 0.900004 11.32454 −1.74399 0.900004 12.24289 −3.09516 0.90000413.10985 −4.42578 0.900004 13.92819 −5.72352 0.900004 14.69921 −6.977910.900004 15.42276 −8.18032 0.900004 16.09948 −9.32245 0.900004 16.72949−10.3972 0.900004 17.31203 −11.399 0.900004 17.84639 −12.3232 0.90000418.33211 −13.1662 0.900004 18.76875 −13.9256 0.900004 19.15608 −14.59980.900004 19.49433 −15.1887 0.900004 19.78422 −15.6932 0.900004 20.02698−16.1155 0.900004 20.22456 −16.4589 0.900004 20.37953 −16.7281 0.90000420.46264 −16.9447 0.900004 20.42886 −17.1031 0.900004 20.37025 −17.18680.900004 20.30923 −17.2362 0.900004 20.2445 −17.2675 0.900004 20.15267−17.2856 0.900004 20.00666 −17.2592 0.900004 19.84907 −17.1166 0.90000419.68923 −16.8812 0.900004 19.48562 −16.5808 0.900004 19.23577 −16.21120.900004 18.93783 −15.7691 0.900004 18.59078 −15.2528 0.900004 18.19422−14.6611 0.900004 17.74806 −13.9942 0.900004 17.2529 −13.2532 0.90000416.7096 −12.44 0.900004 16.11903 −11.5578 0.900004 15.48255 −10.61060.900004 14.80126 −9.6032 0.900004 14.07531 −8.54228 0.900004 13.30678−7.43383 0.900004 12.49564 −6.28611 0.900004 11.64091 −5.10885 0.90000410.74465 −3.91031 0.900004 9.805484 −2.70201 0.900004 8.821357 −1.496910.900004 7.793719 −0.30614 0.900004 6.721673 0.856217 0.900004 5.6033571.973637 0.900004 4.440426 3.031127 0.900004 3.23526 4.012393 0.9000041.991788 4.900225 0.900004 0.716701 5.677614 0.900004 −0.57924 6.3298850.900004 −1.88173 6.844971 0.900004 −3.17268 7.215975 0.900004 −4.431567.442152 0.900004 −5.63709 7.529648 0.900004 −6.76929 7.492081 0.900004−7.81186 7.350493 0.900004 −8.75399 7.130682 0.900004 −9.59108 6.8607720.900004 −10.3247 6.569399 0.900004 −10.9616 6.283853 0.900004 −11.51246.030232 0.900004 −11.9878 5.830082 0.900004 −12.3978 5.709599 0.900004−12.7395 5.690255 0.900004 −12.9918 5.76125 0.900004 −13.1508 5.861770.900004 −12.9865 7.976182 1 −13.0356 8.054964 1 −13.0926 8.177196 1−13.1411 8.37962 1 −13.1259 8.669241 1 −12.9914 9.023306 1 −12.71579.407476 1 −12.3003 9.798853 1 −11.7485 10.18072 1 −11.0637 10.5378 1−10.2492 10.85342 1 −9.31003 11.10894 1 −8.25393 11.28412 1 −7.0920311.35842 1 −5.83933 11.31218 1 −4.51447 11.12867 1 −3.13897 10.79517 1−1.73596 10.30445 1 −0.3286 9.655171 1 1.061562 8.852089 1 2.4163927.90589 1 3.721882 6.831527 1 4.968742 5.647084 1 6.152029 4.372252 17.269175 3.026017 1 8.321071 1.627728 1 9.310894 0.196072 1 10.24291−1.25154 1 11.12081 −2.69968 1 11.94647 −4.13526 1 12.72377 −5.54504 113.45583 −6.91718 1 14.14432 −8.24146 1 14.78932 −9.50935 1 15.39205−10.7126 1 15.95283 −11.8441 1 16.47112 −12.8983 1 16.94646 −13.8705 117.37861 −14.757 1 17.76718 −15.5553 1 18.11199 −16.2641 1 18.41314−16.8832 1 18.67133 −17.4136 1 18.88759 −17.8574 1 19.06364 −18.2184 119.20175 −18.5013 1 19.2725 −18.7256 1 19.22853 −18.8838 1 19.16368−18.9645 1 19.09855 −19.0102 1 19.03065 −19.0373 1 18.93621 −19.0489 118.79031 −19.0107 1 18.64248 −18.8531 1 18.49766 −18.6027 1 18.31315−18.2833 1 18.08665 −17.8903 1 17.81648 −17.4206 1 17.50163 −16.8721 117.1417 −16.2438 1 16.73656 −15.5358 1 16.28664 −14.7494 1 15.79281−13.8866 1 15.25562 −12.9506 1 14.67637 −11.9455 1 14.05594 −10.8762 113.39444 −9.74913 1 12.69374 −8.57054 1 11.95352 −7.34855 1 11.17313−6.0923 1 10.35433 −4.81006 1 9.495173 −3.5131 1 8.593986 −2.2133 17.652219 −0.92115 1 6.667641 0.349469 1 5.637885 1.583301 1 4.5645962.767045 1 3.448281 3.884998 1 2.290173 4.919994 1 1.094161 5.854991 1−0.13228 6.674185 1 −1.37779 7.364115 1 −2.62793 7.913306 1 −3.864428.315359 1 −5.06612 8.571593 1 −6.21147 8.691306 1 −7.28104 8.691792 1−8.25987 8.596561 1 −9.13892 8.433225 1 −9.9155 8.231096 1 −10.59258.01868 1 −11.1778 7.825232 1 −11.6794 7.672655 1 −12.106 7.590761 1−12.4538 7.602016 1 −12.7025 7.697642 1 −12.8531 7.815413 1 −13.00319.044575 1.074999 −13.0484 9.126953 1.074999 −13.0986 9.254004 1.074999−13.1342 9.461807 1.074999 −13.1004 9.75361 1.074999 −12.9443 10.104051.074999 −12.6454 10.4783 1.074999 −12.2055 10.85332 1.074999 −11.627811.21141 1.074999 −10.916 11.53609 1.074999 −10.0746 11.80954 1.074999−9.10979 12.01216 1.074999 −8.03116 12.12316 1.074999 −6.85189 12.12221.074999 −5.58902 11.99056 1.074999 −4.26291 11.71349 1.074999 −2.8961211.28099 1.074999 −1.51206 10.6886 1.074999 −0.13286 9.938697 1.0749991.222904 9.040779 1.074999 2.538116 8.005444 1.074999 3.802071 6.8499651.074999 5.008175 5.593149 1.074999 6.153232 4.254236 1.074999 7.2352332.851018 1.074999 8.255112 1.40155 1.074999 9.215855 −0.07661 1.07499910.12156 −1.56685 1.074999 10.97556 −3.05444 1.074999 11.77906 −4.526891.074999 12.53566 −5.97135 1.074999 13.24836 −7.37615 1.074999 13.91883−8.73113 1.074999 14.54697 −10.0279 1.074999 15.13409 −11.258 1.07499915.6805 −12.4145 1.074999 16.18558 −13.4919 1.074999 16.64896 −14.48531.074999 17.07042 −15.391 1.074999 17.44952 −16.2065 1.074999 17.78603−16.9305 1.074999 18.08002 −17.5628 1.074999 18.33212 −18.1044 1.07499918.54334 −18.5577 1.074999 18.7153 −18.9264 1.074999 18.85024 −19.21531.074999 18.9196 −19.4432 1.074999 18.87356 −19.603 1.074999 18.80664−19.6838 1.074999 18.73987 −19.729 1.074999 18.67042 −19.7551 1.07499918.57434 −19.7648 1.074999 18.42732 −19.7221 1.074999 18.28196 −19.55791.074999 18.14015 −19.3009 1.074999 17.95939 −18.973 1.074999 17.73739−18.5697 1.074999 17.47243 −18.0877 1.074999 17.16349 −17.5251 1.07499916.81007 −16.8807 1.074999 16.41204 −16.1548 1.074999 15.9697 −15.34861.074999 15.48401 −14.4641 1.074999 14.95537 −13.5048 1.074999 14.38521−12.4746 1.074999 13.77435 −11.3785 1.074999 13.12321 −10.223 1.07499912.43368 −9.01416 1.074999 11.70552 −7.76017 1.074999 10.93886 −6.469671.074999 10.13549 −5.15098 1.074999 9.293391 −3.81528 1.074999 8.41185−2.47367 1.074999 7.492777 −1.13614 1.074999 6.533236 0.183344 1.0749995.531311 1.47049 1.074999 4.48936 2.713278 1.074999 3.40696 3.8963421.074999 2.283883 5.002626 1.074999 1.122591 6.015316 1.074999 −0.071316.918313 1.074999 −1.28918 7.696288 1.074999 −2.51834 8.336464 1.074999−3.74242 8.829568 1.074999 −4.94101 9.174022 1.074999 −6.09222 9.3761161.074999 −7.17521 9.450966 1.074999 −8.17291 9.420629 1.074999 −9.073779.311247 1.074999 −9.87287 9.153786 1.074999 −10.5711 8.977498 1.074999−11.1744 8.811704 1.074999 −11.6911 8.684391 1.074999 −12.1271 8.6190911.074999 −12.4795 8.642708 1.074999 −12.7281 8.749077 1.074999 −12.87588.875013 1.074999 −13.8259 8.977306 1.150004 −13.8745 9.059363 1.150004−13.9289 9.186857 1.150004 −13.9697 9.396835 1.150004 −13.9427 9.6936421.150004 −13.7955 10.05399 1.150004 −13.506 10.44422 1.150004 −13.07410.84093 1.150004 −12.5014 11.22516 1.150004 −11.7909 11.57893 1.150004−10.9463 11.88294 1.150004 −9.97369 12.11617 1.150004 −8.88258 12.256571.150004 −7.68642 12.28291 1.150004 −6.40266 12.17606 1.150004 −5.0519811.92144 1.150004 −3.65698 11.50984 1.150004 −2.24086 10.93745 1.150004−0.82493 10.20809 1.150004 0.574488 9.334273 1.150004 1.940228 8.3250031.150004 3.263178 7.198707 1.150004 4.53772 5.974442 1.150004 5.7606844.670892 1.150004 6.929033 3.304584 1.150004 8.042141 1.892407 1.1500049.101275 0.451098 1.150004 10.10896 −1.00317 1.150004 11.06698 −2.4561.150004 11.97486 −3.89546 1.150004 12.83476 −5.30877 1.150004 13.6486−6.68421 1.150004 14.41726 −8.01151 1.150004 15.13968 −9.28237 1.15000415.81663 −10.4883 1.150004 16.44774 −11.6222 1.150004 17.03193 −12.67861.150004 17.56843 −13.6528 1.150004 18.05676 −14.5409 1.150004 18.49623−15.3405 1.150004 18.88647 −16.0503 1.150004 19.22744 −16.6701 1.15000419.51987 −17.2011 1.150004 19.76486 −17.6454 1.150004 19.96432 −18.00671.150004 20.12081 −18.2899 1.150004 20.20852 −18.5151 1.150004 20.17454−18.6804 1.150004 20.11261 −18.7669 1.150004 20.04813 −18.8172 1.15000419.97942 −18.8483 1.150004 19.88258 −18.8643 1.150004 19.73085 −18.82971.150004 19.57404 −18.6713 1.150004 19.41318 −18.42 1.150004 19.20804−18.0993 1.150004 18.95596 −17.7051 1.150004 18.65488 −17.234 1.15000418.3036 −16.6842 1.150004 17.90145 −16.0546 1.150004 17.44827 −15.34551.150004 16.9444 −14.5582 1.150004 16.39105 −13.6946 1.150004 15.78871−12.7582 1.150004 15.13932 −11.7527 1.150004 14.44408 −10.6834 1.15000413.70423 −9.55628 1.150004 12.92221 −8.37745 1.150004 12.09852 −7.155071.150004 11.23484 −5.89722 1.150004 10.33367 −4.61208 1.150004 9.393677−3.31108 1.150004 8.416509 −2.0042 1.150004 7.404286 −0.70161 1.1500046.356054 0.583512 1.150004 5.271648 1.837789 1.150004 4.153185 3.0488821.150004 3.002144 4.202959 1.150004 1.818016 5.282642 1.150004 0.6034236.271535 1.150004 −0.63644 7.153646 1.150004 −1.89417 7.912622 1.150004−3.15769 8.535591 1.150004 −4.41169 9.011999 1.150004 −5.63637 9.3393581.150004 −6.8102 9.523003 1.150004 −7.91236 9.577263 1.150004 −8.925599.523939 1.150004 −9.83848 9.391415 1.150004 −10.6461 9.209494 1.150004−11.3504 9.009748 1.150004 −11.9581 8.822197 1.150004 −12.4782 8.6735791.150004 −12.918 8.58729 1.150004 −13.277 8.592854 1.150004 −13.53468.688558 1.150004 −13.6902 8.80994 1.150004 −13.7747 8.905837 1.150004

In the above table, the plane Zadim=0 corresponds to the reference planeP0 situated at the base of the profile. This plane P0 is theintersection of the stacking axis AE of the set of blades with theaxisymmetric surface of the hub, i.e. it passes via the intersectionbetween the axis AE and the surface where it is assembled with theplatform 14. The plane Zadim=1 corresponds to the reference plane P1situated at the top of the profile. This plane P1 is the intersectionbetween the axis AE and the axisymmetric surface of the casing, i.e. itpasses via the intersection of the axis AE with the surface where it isassembled with the top platform 10.

By convention, the stacking axis AE of a blade of a rotary wheel, is anaxis that extends in the radial direction Z and is an axis on which thevarious X,Y sections of the set of blades are “stacked” when designingthe set of blades.

As mentioned at the beginning of the present description, theaerodynamic profile of the disclosure is substantially identical to thenominal profile defined in the above table, i.e. it departs from saidnominal profile by very little at most, being defined in particularwithin an envelope of ±1 mm in a direction normal to the surface of thenominal profile, and/or having X,Y coordinates lying within a range of±5% relative to the coordinates X,Y of the nominal profile. Also, theaerodynamic profile is positioned rotated within ±10°, particularlywithin ±5°, more particularly within ±3°, with respect to the stackingaxis of the blade. In other words, the stagger angle may vary by ±10°,particularly by ±5°, more particularly by ±3°.

The coordinates of the above table are given starting from a valueZadim=0 in the reference plane P0. The coordinate Zadim isnon-dimensional, i.e. for a point P, situated at a distance D from theplane P0 (where D is measured along the axis Z), the value of Zadim isD/H, where H represents the total height of the profile as measuredbetween the planes P0 and P1. Naturally, in the table above, bymultiplying the coordinate Zadim by the height H, it is possible toobtain the complete coordinates of the blade.

Preferably, the height H of the profile of the blade lies in the range145 mm±10%. By way of example, the reference plane P0 is at a distanceof about 402 mm±10% from the axis A of the turbine.

In the above table, the profile is characterized by fifteen sectionplanes at constant Zadim coordinates, for which the coordinates X and Yare specified. These fifteen section planes include eleven sectionplanes located between Zadim=0 and Zadim=1, and thus arranged in thefluid stream, these section planes being distributed on the vane'sheight from P0 to P1. The fifteen section planes also include foursection planes which are substantially outside the fluid stream (twosection planes with Zadim<0, and two section planes with Zadim>1), thesefour section planes being provided for ensuring geometric continuity ofthe stacking, close to the head and the foot, respectively. In eachsection plane at constant coordinate Zadim, the section of the profileis given by a continuous and smooth curve, interconnecting all of thepoints (X,Y). In each section plane, the profile is interpolated so asto generate a uniform profile.

It is advantageous for the rotary wheel that includes the blade of thedisclosure to have 98 to 118 blades, in particular 108 blades, thatpresent aerodynamic profiles as defined above.

The invention claimed is:
 1. A turbine blade presenting an aerodynamicprofile that, when cold and in a non-coated state, is substantiallyidentical to a nominal profile determined by Cartesian coordinatesX,Y,Zadim given in Table 1, in which the coordinate Zadim is a quotientD/H, where D is a distance of a point under consideration from a firstreference X,Y plane situated at a base of the nominal profile, and H isa height of said nominal profile measured from said first referenceplane that is an intersection of a stacking axis of the turbine bladeand an axisymmetric surface of a hub, out to a second reference planethat is an intersection of said stacking axis with an axisymmetricsurface of a casing, D and H being taken radially relative to an axialdirection of the turbine, while the coordinate X is measured in theaxial direction of the turbine.
 2. The turbine blade as claimed in claim1, wherein the turbine blade is a blade of a rotary wheel forming aportion of a rotor of a turbine.
 3. A turbine, including a plurality ofturbine blades each presenting the aerodynamic profile as claimed inclaim
 1. 4. A turbine as claimed in claim 3, including a rotary wheel,having 98 to 118 turbine blades that each presents the aerodynamicprofile.
 5. A turbine as claimed in claim 3, including a rotary wheel,having 108 turbine blades that each presents the aerodynamic profile. 6.A rotary wheel of a turbine forming a portion of a turbine rotor, therotary wheel including a plurality of turbine blades that each presentsthe aerodynamic profile as claimed in claim
 1. 7. The rotary wheel of aturbine as claimed in claim 6, including 98 to 118 turbine blades thateach presents the aerodynamic profile.
 8. The rotary wheel of a turbineas claimed in claim 6, including 108 turbine blades that each presentsthe aerodynamic profile.
 9. A turbine blade presenting an aerodynamicprofile that, when cold and in a non-coated state, corresponds to anominal profile determined by Cartesian coordinates X,Y,Zadim given inTable 1, in which the coordinate Zadim is a quotient D/H, where D is adistance of a point under consideration from a first reference X,Y planesituated at a base of the nominal profile, and H is a height of saidnominal profile measured from said first reference plane that is anintersection of a stacking axis of the turbine blade and an axisymmetricsurface of a hub, out to a second reference plane that is anintersection of said stacking axis with an axisymmetric surface of acasing, D and H being taken radially relative to an axial direction ofthe turbine, while the coordinate X is measured in the axial directionof the turbine, wherein: (1) said aerodynamic profile is defined withinan envelope of ±1 mm in a direction normal to a surface of the nominalprofile, or (2) the coordinates X,Y of said aerodynamic profile liewithin a range of ±5% relative to the coordinates X,Y of the nominalprofile.
 10. A turbine blade presenting an aerodynamic profile that,when cold and in a non-coated state, corresponds to a nominal profiledetermined by Cartesian coordinates X,Y,Zadim given in Table 1, in whichthe coordinate Zadim is a quotient D/H, where D is a distance of a pointunder consideration from a first reference X,Y plane situated at a baseof the nominal profile, and H is a height of said nominal profilemeasured from said first reference plane that is an intersection of astacking axis of the turbine blade and an axisymmetric surface of a hub,out to a second reference plane that is an intersection of said stackingaxis with an axisymmetric surface of a casing, D and H being takenradially relative to an axial direction of the turbine, while thecoordinate X is measured in the axial direction of the turbine, whereinthe aerodynamic profile is positioned within ±10° with respect to thestacking axis of the turbine blade.
 11. The turbine blade as claimed inclaim 10, wherein the aerodynamic profile is positioned within ±5° withrespect to the stacking axis of the turbine blade.
 12. The turbine bladeas claimed in claim 10, wherein the aerodynamic profile is positionedwithin ±3° with respect to the stacking axis of the turbine blade.